The knee is a meeting place for four bones — the femur (thigh bone), tibia (shinbone), fibula (calf bone), and patella (kneecap). It requires several ligaments to keep these bones in place and ...

The knee joint capsule is the structure surrounding the knee, made up of ligaments, bone, and fluid-filled cavities. It allows the full knee to have flexion, or bending motion, due to the folds within ...